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What Is pH of Saliva?

by
author image Melanie Clatfelter
Melanie Clatfelter began writing in 2010 for various websites. She earned her Associate of Arts from Florida State University in 1996, concentrating in biological sciences. After working for five years in early childhood education, Clatfelter earned her diploma in practical nursing from Central Carolina Community College in 2009 and is now a licensed practical nurse in North Carolina.
What Is pH of Saliva?
Young man holding his mouth open. Photo Credit XiXinXing/XiXinXing/Getty Images

The pH scale measures, on a scale from 0 to 14, the acidic or basic qualities of a chemical. The pH of battery acid is 0, while the pH of lye, a basic, or alkaline, cleaning substance, is close to 14. Water, with a pH of 7, is neutral, being neither acidic or basic.

Normal pH of Saliva

The normal pH range for saliva is considered to be 5.6 to 7.9, according to the International Journal of Drug Testing. This keeps the pH balance in the body close to neutral.

Why pH Varies

Food and drink change the pH of saliva. Age may be a factor also, as children have an average saliva pH of 7.5, while adults tend to be more acidic, with a saliva pH of 6.5 or lower.

How to Determine pH of Saliva

Wait at least two hours after eating or drinking to ensure that the food consumed does not alter test results. Cleanse the mouth by filling the mouth with saliva and then swallowing or spitting. Fill the mouth again with saliva and place a small amount on a pH strip. The strip will change colors based on the results.

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